Add issue and pull request template. (#19)

Just like my PR in Zelda3 repo, I've added Issue and PR template.

This PR also fixes the building link.

.github/ISSUE_TEMPLATE/bugs.yml

@@ -0,0 +1,22 @@
+name: Bug report
+description: Report bugs here.
+labels: [bug]
+body:
+  - type: textarea
+    id: description
+    attributes:
+      label: "Describe your bug here. And how to reproduce it. (If possible, please send the save that the bug occurs.)"
+    validations:
+      required: true
+
+ 
+  - type: dropdown
+    id: btarget
+    attributes:
+      label: "What is your build target?"
+      options:
+        - "Windows"
+        - "Linux"
+        - "Mac"
+    validations:
+      required: true

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,2 @@
+blank_issues_enabled: false
+contact_links: []

.github/ISSUE_TEMPLATE/feature-request.yml

@@ -0,0 +1,9 @@
+name: Feature Request
+description: Ask for a feature or just give ideas!
+labels: [enhancement]
+body:
+  - type: textarea
+    attributes:
+      label: What feature do you want to get added? And how it will work?
+    validations:
+      required: true

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,8 @@
+### Description
+<!-- What is the purpose of this PR and what it adds? -->
+
+### Will this Pull Request break anything? 
+<!-- Will it break the compiling? -->
+
+### Suggested Testing Steps
+<!-- See if the compiling fails/break anything in the game. -->

README.md

@@ -4,7 +4,7 @@ Our discord server is: https://discord.gg/AJJbJAzNNJ
 
 Early version. It has bugs and the code is messy.
 
-For building instructions, see: https://github.com/snesrev/sm-BUILDING.MD/blob/main/BUILDING.MD
+For building instructions, see: https://github.com/snesrev/sm/blob/main/BUILDING.md
 
 Put sm.smc (sha1 hash da957f0d63d14cb441d215462904c4fa8519c613) in the root folder. When running, it will run both versions and compare frame by frame. If it detects a mismatch, it saves a snapshot in saves/ and displays a counter on screen counting down from 300.