Fix issue/PR templates & add sponsor button

Referenced in #1554, #1532, #1051

.github/PULL_REQUEST_TEMPLATE/bug_fix.md

@@ -0,0 +1,14 @@
+---
+name: "Bug Fix"
+about: "For fixing bugs originating from Doom"
+title: "[BUGFIX] "
+labels: "is:bug", "status:pending-review"
+---
+
+> This category is for bug fixes.
+
+Thank you for contributing to Doom!
+
+Before you submit this PR, please make sure it is targeted at the `develop`
+branch and not `master`. Include links to relevant issues or, if the issue isn't
+self-evident, describe the problem that is being fixed.

.github/PULL_REQUEST_TEMPLATE/documentation.md

@@ -0,0 +1,13 @@
+---
+name: "Documentation"
+about: "PRs that affect documentation files"
+title: "[DOCS] "
+labels: "re:docs", "status:pending-review"
+---
+
+> This category is for additions or corrections to Doom's documentation.
+
+Thank you for contributing to Doom!
+
+Before you submit this PR, please make sure it is targeted at the `develop`
+branch and not `master`.

.github/PULL_REQUEST_TEMPLATE/feature.md

@@ -0,0 +1,14 @@
+---
+name: "New Feature"
+about: "For new bells 'n whistles for old modules"
+title: "[FEATURE] "
+labels: "is:request", "status:pending-review"
+---
+
+> This category is for PRs that add features to pre-existing modules or Doom
+> core.
+
+Thank you for contributing to Doom!
+
+Before you submit this PR, please make sure it is targeted at the `develop`
+branch and not `master`.

.github/PULL_REQUEST_TEMPLATE/maintenance.md

@@ -0,0 +1,15 @@
+---
+name: "Maintenance"
+about: "Minor corrections, refactors or bugfixes for changes upstream"
+title: "[MAINTAIN] "
+labels: "is:refactor", "status:pending-review"
+---
+
+> This category is for PRs that preform minor or cosmetic changes, refactors, or
+> fixes for bugs introduced by changes upstream or elsewhere.
+
+Thank you for contributing to Doom!
+
+Before you submit this PR, please make sure it is targeted at the `develop`
+branch and not `master`. Include links to relevant issues or, if the issue isn't
+self-evident, describe the problem that is being fixed.

.github/PULL_REQUEST_TEMPLATE/new_module.md

@@ -0,0 +1,13 @@
+---
+name: "New Module"
+about: "For brand spankin' new modules"
+title: "[MODULE] "
+labels: "is:request", "re:module", "status:pending-review"
+---
+
+> This category is for PRs that add new modules.
+
+Thank you for contributing to Doom!
+
+Before you submit this PR, please make sure it is targeted at the `develop`
+branch and not `master`.