Add templates for main issue types

Fix #1741

Author: NickVolynkin

.github/ISSUE_TEMPLATE/document.md

@@ -0,0 +1,46 @@
+---
+name: Write or Update
+about: Write or update a documentation page
+title: "[0pt] {feature name}"
+labels: 
+assignees:
+---
+# Feature name
+
+Fill in whatever you know at the moment.
+
+**Product:** Tarantool, Cartridge, TDG, connectors, tools?
+**Since:** product version
+**Audience/target:** who will read it and for what task?
+**Root document:** where to add or update documentation
+**SME:** @ expert to ask for more information
+**Peer reviewer:** @ documentarian name
+
+# Details
+
+*   What should we write about?
+*   What's most important?
+*   Examples of code and configuration.
+*   Related development issues and/or commits.
+
+# DoD
+
+- [ ] do A
+- [ ] do B
+
+# Planning checklist
+
+- [ ] Pick product label:
+  - [server](https://github.com/tarantool/doc/labels/server) for Tarantool core
+  - [cartridge](https://github.com/tarantool/doc/labels/cartridge),
+  - [tdg](https://github.com/tarantool/doc/labels/tdg), or
+  - [ecosystem](https://github.com/tarantool/doc/labels/ecosystem)
+    for tools and connectors.
+- [ ] Pick type label: 
+  - [reference](https://github.com/tarantool/doc/labels/reference),
+  - [getting started](https://github.com/tarantool/doc/labels/getting%20started),
+  - [user_guide](https://github.com/tarantool/doc/labels/user_guide), etc. 
+- [ ] Estimate complexity in storypoints in the title
+- [ ] Add to **Documentation** board → **Backlog**
+
+> Note: issue templates are in beta. Give your feedback in #1869.

.github/ISSUE_TEMPLATE/fix.md

@@ -0,0 +1,22 @@
+---
+name: Fix & Proofread
+about: Fix typos, proofread document
+title: "[0pt] Typo {document name}"
+labels: typo
+assignees:
+---
+
+## Info
+
+**Root document:** where to fix the docs
+
+## What's wrong?
+
+Please give details or examples.
+
+## Planning checklist
+
+- [ ] Estimate complexity in storypoints in the title.
+- [ ] Add to **Documentation** board → **Backlog (small)**
+
+> Note: issue templates are in beta. Give your feedback in #1869.

.github/ISSUE_TEMPLATE/tech.md

@@ -0,0 +1,26 @@
+---
+name: Technical/internal issue
+about: Technical debt in the docs
+title: "[0pt] {do X}"
+labels: 
+assignees:
+---
+# What needs to be done
+
+**Reviewer:** @ documentarian name
+
+# DoD
+
+- [ ] do A
+- [ ] do B
+
+# Planning checklist
+
+- [ ] Pick label:
+  - [CI/CD](https://github.com/tarantool/doc/labels/CI/CD)
+  - [localization](https://github.com/tarantool/doc/labels/localization)
+  - or others.  
+- [ ] Estimate complexity in storypoints in the title
+- [ ] Add to **Documentation** board → **Backlog**
+
+> Note: issue templates are in beta. Give your feedback in #1869.

.github/ISSUE_TEMPLATE/translate.md

@@ -1,17 +1,22 @@
 ---
 name: Translate
 about: Translation issue
-title: "[0sp] Translate"
+title: "[0pt] Translate {document_title}"
 labels: localization
 assignees: ladyune
 
 ---
+## Info
 
-Page: link to website
-Crowdin: link to file in Crowdin
-Words: amount of words to translate, see in Crowdin
-Reviewer: author of the document or subject matter expert
+**Page:** link to website
+**Crowdin:** link to file in Crowdin
+**Words:** amount of words to translate, see in Crowdin
+**Reviewer:** author of the document or subject matter expert
 
-- [ ] Add to Localization board → Ready for review
-- [ ] Evaluate *review* in storypoints in the title
-- [ ] Add to Docs board → Backlog, so that we can plan it
+## Issue planning checklist
+
+- [ ] Estimate *review* in storypoints in the title
+- [ ] Add to **Localization** board → **Ready for review**
+- [ ] Add to **Documentation** board → **Backlog**
+
+> Note: issue templates are in beta. Give your feedback in #1869.