Edit issue templates: md -> yaml, init plugin_request

Signed-off-by: Hadi <112569860+anotherhadi@users.noreply.github.com>

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,28 +0,0 @@
----
-name: "🐞 Bug Report"
-about: Report a reproducible error
-title: "[BUG] "
-labels: bug
----
-
-**Describe the bug**
-A clear and concise description of the issue.
-
-**To Reproduce**
-
-1. Go to '...'
-2. Click on '....'
-3. See error
-
-**Expected Behavior**
-
-What should have happened.
-
-**Environment**
-
-- OS:
-- Version (`spilltea -v`):
-
-**Additional Context**
-
-Add any logs or screenshots here.

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,57 @@
+name: "🐞 Bug Report"
+description: Report a reproducible error
+title: "[BUG] "
+labels: ["bug"]
+body:
+  - type: textarea
+    id: description
+    attributes:
+      label: Describe the bug
+      description: A clear and concise description of the issue.
+    validations:
+      required: true
+
+  - type: textarea
+    id: steps
+    attributes:
+      label: Steps to reproduce
+      description: Step-by-step instructions to trigger the bug.
+      placeholder: |
+        1. ...
+        2. ...
+        3. See error
+    validations:
+      required: true
+
+  - type: textarea
+    id: expected
+    attributes:
+      label: Expected behavior
+      description: What should have happened instead.
+    validations:
+      required: true
+
+  - type: input
+    id: os
+    attributes:
+      label: Operating system
+      placeholder: "e.g. Ubuntu 24.04, macOS 15"
+    validations:
+      required: true
+
+  - type: input
+    id: version
+    attributes:
+      label: spilltea version
+      description: Output of `spilltea -v`
+      placeholder: "e.g. v0.3.1"
+    validations:
+      required: true
+
+  - type: textarea
+    id: additional
+    attributes:
+      label: Additional context
+      description: Logs, screenshots, or anything else relevant.
+    validations:
+      required: false

.github/ISSUE_TEMPLATE/feature_request.md

@@ -1,22 +0,0 @@
----
-name: "🚀 Feature Request"
-about: Suggest an idea for this project
-title: "[FEATURE] "
-labels: enhancement
----
-
-**Is your feature request related to a problem?**
-
-A description of what the problem is (e.g. I'm always frustrated when...).
-
-**Describe the solution**
-
-A clear description of what you want to happen.
-
-**Describe alternatives**
-
-Any alternative solutions or features you've considered.
-
-**Additional context**
-
-Add any other context or mockups here.

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -0,0 +1,37 @@
+name: "🚀 Feature Request"
+description: Suggest an idea for this project
+title: "[FEATURE] "
+labels: ["enhancement"]
+body:
+  - type: textarea
+    id: problem
+    attributes:
+      label: Problem
+      description: Is your feature request related to a problem? Describe it.
+      placeholder: "I'm always frustrated when..."
+    validations:
+      required: false
+
+  - type: textarea
+    id: solution
+    attributes:
+      label: Proposed solution
+      description: A clear description of what you want to happen.
+    validations:
+      required: true
+
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: Alternatives considered
+      description: Any alternative solutions or features you've thought about.
+    validations:
+      required: false
+
+  - type: textarea
+    id: additional
+    attributes:
+      label: Additional context
+      description: Mockups, related issues, or anything else relevant.
+    validations:
+      required: false

.github/ISSUE_TEMPLATE/plugin_request.yml

@@ -0,0 +1,52 @@
+name: "🧩 Plugin Request"
+description: Suggest a plugin idea or propose an existing plugin
+title: "[PLUGIN] "
+labels: ["plugin"]
+body:
+  - type: dropdown
+    id: request_type
+    attributes:
+      label: Request type
+      description: Are you proposing an idea or an already-built plugin?
+      options:
+        - "Plugin idea — I have an idea but haven't built it"
+        - "Plugin proposal — I have already built a plugin"
+    validations:
+      required: true
+
+  - type: textarea
+    id: description
+    attributes:
+      label: Description
+      description: >
+        **If this is an idea:** describe what the plugin would do and the problem it solves.
+        **If this is a proposal:** describe what your plugin does and link to its repository.
+      placeholder: "This plugin would..."
+    validations:
+      required: true
+
+  - type: input
+    id: repo
+    attributes:
+      label: Repository (proposals only)
+      description: Link to the plugin repository, if it exists.
+      placeholder: "https://github.com/..."
+    validations:
+      required: false
+
+  - type: textarea
+    id: use_case
+    attributes:
+      label: Use case
+      description: Who would benefit from this plugin and in what scenario?
+      placeholder: "Useful when testing APIs that..."
+    validations:
+      required: false
+
+  - type: textarea
+    id: additional
+    attributes:
+      label: Additional context
+      description: Screenshots, mockups, related issues, or anything else relevant.
+    validations:
+      required: false