docs: create issue templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: bug
+assignees: daimond113
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+If the issue is with:
+- pesde's library (e.g. linking):
+  1. include your project's manifest (pesde.toml)
+  2. if possible, a repository with a minimal reproduction of the issue.
+- pesde's CLI (e.g. authentication):
+  1. include a screenshot or copy-paste the output of the CLI.
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Please complete the following information:**
+ - pesde: (e.g. 0.6.0)
+ - Operating system: (e.g. Windows 11, macOS 15, Ubuntu 24.04)
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/engine-support-request.md

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+---
+name: Engine support request
+about: Suggest a new engine
+title: "[ENGINE]"
+labels: enhancement
+assignees: daimond113
+
+---
+
+**General information about the engine**
+Name: Lune
+Repository: https://github.com/lune-org/lune
+
+**Checklist**
+| Question                                                                             | Answer |
+|--------------------------------------------------------------------------------------|--------|
+| Is this engine versioned according to [SemVer](https://semver.org/spec/v2.0.0.html)? | <ul><li>- [ ] </li></ul>    |
+| Does this engine provide pre-compiled builds?                                        | <ul><li>- [ ] </li></ul>    |
+| Will the engine get support for at least a year after it gets added to pesde?        | <ul><li>- [ ] </li></ul>    |
+| Does the engine have any notable differences to plain Luau (e.g. IO APIs)?        | <ul><li>- [ ] </li></ul>    |
+| Does the engine correctly implement `require` (according to Luau's RFCs)?        | <ul><li>- [ ] </li></ul>    |
+| Is the engine open-source under a reasonably permissive license?        | <ul><li>- [ ] </li></ul>    |
+
+If the answer is "no" to any of these questions, the engine will not be added.
+
+**Additional information**
+| Question                                                                             | Answer |
+|--------------------------------------------------------------------------------------|--------|
+| Are you willing to submit a pull request adding the engine (and a target for it)? | <ul><li>- [ ] </li></ul>    |
+
+These questions can help fast-track the engine being added.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: enhancement
+assignees: daimond113
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.