Create tech stack docs (techstack.yml and techstack.md)

techstack.md

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+<!--
+--- Readme.md Snippet without images Start ---
+## Tech Stack
+two-inc/bigquery-optimization-queries is built on the following main stack:
+- [Python](https://www.python.org) – Languages
+- [SQL](https://en.wikipedia.org/wiki/SQL) – Languages
+
+Full tech stack [here](/techstack.md)
+--- Readme.md Snippet without images End ---
+
+--- Readme.md Snippet with images Start ---
+## Tech Stack
+two-inc/bigquery-optimization-queries is built on the following main stack:
+- <img width='25' height='25' src='https://img.stackshare.io/service/993/pUBY5pVj.png' alt='Python'/> [Python](https://www.python.org) – Languages
+- <img width='25' height='25' src='https://img.stackshare.io/service/2271/default_068d33483bba6b81ee13fbd4dc7aab9780896a54.png' alt='SQL'/> [SQL](https://en.wikipedia.org/wiki/SQL) – Languages
+
+Full tech stack [here](/techstack.md)
+--- Readme.md Snippet with images End ---
+-->
+<div align="center">
+
+# Tech Stack File
+![](https://img.stackshare.io/repo.svg "repo") [two-inc/bigquery-optimization-queries](https://github.com/two-inc/bigquery-optimization-queries)![](https://img.stackshare.io/public_badge.svg "public")
+<br/><br/>
+|3<br/>Tools used|11/09/23 <br/>Report generated|
+|------|------|
+</div>
+
+## <img src='https://img.stackshare.io/languages.svg'/> Languages (2)
+<table><tr>
+  <td align='center'>
+  <img width='36' height='36' src='https://img.stackshare.io/service/993/pUBY5pVj.png' alt='Python'>
+  <br>
+  <sub><a href="https://www.python.org">Python</a></sub>
+  <br>
+  <sub></sub>
+</td>
+
+<td align='center'>
+  <img width='36' height='36' src='https://img.stackshare.io/service/2271/default_068d33483bba6b81ee13fbd4dc7aab9780896a54.png' alt='SQL'>
+  <br>
+  <sub><a href="https://en.wikipedia.org/wiki/SQL">SQL</a></sub>
+  <br>
+  <sub></sub>
+</td>
+
+</tr>
+</table>
+
+## <img src='https://img.stackshare.io/devops.svg'/> DevOps (1)
+<table><tr>
+  <td align='center'>
+  <img width='36' height='36' src='https://img.stackshare.io/service/1046/git.png' alt='Git'>
+  <br>
+  <sub><a href="http://git-scm.com/">Git</a></sub>
+  <br>
+  <sub></sub>
+</td>
+
+</tr>
+</table>
+
+<br/>
+<div align='center'>
+
+Generated via [Stack File](https://github.com/apps/stack-file)

techstack.yml

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+repo_name: two-inc/bigquery-optimization-queries
+report_id: e0cc4acb8f244fa7c0db9c2053f09689
+repo_type: Public
+timestamp: '2023-11-09T15:40:00+00:00'
+requested_by: jisoo411
+provider: github
+branch: main
+detected_tools_count: 3
+tools:
+- name: Python
+  description: A clear and powerful object-oriented programming language, comparable
+    to Perl, Ruby, Scheme, or Java.
+  website_url: https://www.python.org
+  open_source: true
+  hosted_saas: false
+  category: Languages & Frameworks
+  sub_category: Languages
+  image_url: https://img.stackshare.io/service/993/pUBY5pVj.png
+  detection_source: Repo Metadata
+- name: SQL
+  description: It is a domain-specific language used in programming
+  website_url: https://en.wikipedia.org/wiki/SQL
+  open_source: true
+  hosted_saas: false
+  category: Languages & Frameworks
+  sub_category: Languages
+  image_url: https://img.stackshare.io/service/2271/default_068d33483bba6b81ee13fbd4dc7aab9780896a54.png
+  detection_source: information_schema/top_costly_queries.sql
+  last_updated_by: Sayle Matthews
+  last_updated_on: 2022-11-23 16:00:37.000000000 Z
+- name: Git
+  description: Fast, scalable, distributed revision control system
+  website_url: http://git-scm.com/
+  open_source: true
+  hosted_saas: false
+  category: Build, Test, Deploy
+  sub_category: Version Control System
+  image_url: https://img.stackshare.io/service/1046/git.png
+  detection_source: Repo Metadata