feat: authenticate with github app instllation

- [x] add ability to authenticate with GitHub App Installation
- [x] add tests for GitHub App Installation
- [x] add more tests for env vars

repo updates to match standards:

- [x] alphabetize :allthethings:
- [x] add requirements-test.txt to version our testing dependencies
- [x] update Makefile to point linting commands to our linter configs
      that the GitHub Action workflows use
- [x] add linter configs
- [x] add checkov exemptions to Dockerfile
  - custom user - can't do, need root for GitHub action workspace access
- [x] update README, splitting authentication section
- [x] change .pylintrc to .python-lint (pylint default config file)
- [x] updated all examples to default to read contents permissions
- [x] linted files

I'd highly suggest this be a major version change as there are breaking changes:

- [x] standardize boolean environment variables (true or false)
- [x] drop GITHUB_SERVER_URL and instead use GITHUB_ENTERPRISE_URL for enterprise
      customers (matches our other repos)

Signed-off-by: jmeridth <[email protected]>

.env-example

@@ -1,4 +1,13 @@
-GH_TOKEN = " "
-SEARCH_QUERY = "repo:owner/repo is:open is:issue"
-LABELS_TO_MEASURE = "waiting-for-review,waiting-for-manager"
+GH_APP_ID=""
+GH_APP_INSTALLATION_ID=""
+GH_APP_PRIVATE_KEY=""
+GH_ENTERPRISE_URL = ""
+GH_TOKEN = ""
+HIDE_AUTHOR = "false"
+HIDE_LABEL_METRICS = "false"
+HIDE_TIME_TO_ANSWER = "false"
+HIDE_TIME_TO_CLOSE = "false"
+HIDE_TIME_TO_FIRST_RESPONSE = "false"
 IGNORE_USERS = "user1,user2"
+LABELS_TO_MEASURE = "waiting-for-review,waiting-for-manager"
+SEARCH_QUERY = "repo:owner/repo is:open is:issue"

.github/linters/.flake8

@@ -0,0 +1,5 @@
+[flake8]
+exclude = venv,.venv,.git,__pycache__
+extend-ignore = C901
+max-line-length = 150
+statistics = True

.github/linters/.isort.cfg

@@ -0,0 +1,2 @@
+[settings]
+profile = black