migrate opentoc and SEN (including fellows' profile)

[yqtianust]

for issue #89

[github-actions]

Preview deployed at: https://www2.sigsoft.org/pr-92

[github-actions]

Preview deployed at: https://www2.sigsoft.org/pr-92

[github-actions]

Preview deployed at: https://www2.sigsoft.org/pr-92

[Copilot]

Pull Request Overview

This PR migrates various OpenTOC (Table of Contents) HTML files and SEN (Software Engineering Network) materials to the content directory as part of issue #89. The migration includes conference proceedings from multiple years and workshops.

Key changes include:

• Addition of 12 HTML table of contents files for various conferences (EASEAI, DeMobile, DEBS spanning 2014-2021)
• Each file contains structured conference proceedings with session organization, paper titles, author lists, and ACM Digital Library links
• Files follow consistent HTML structure with embedded CSS styling for presentation

Reviewed Changes

Copilot reviewed 59 out of 236 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
content/opentoc/EASEAI2019-TOC.html	Table of contents for 1st EASEAI workshop proceedings
content/opentoc/EASEAI-21toc.html	Table of contents for 3rd EASEAI workshop proceedings
content/opentoc/DeMobile2015-TOC.html	Table of contents for 3rd DeMobile workshop proceedings
content/opentoc/DeMobile2014-TOC.html	Table of contents for 2nd DeMobile workshop proceedings
content/opentoc/DEBS2020-TOC.html	Table of contents for 14th DEBS conference proceedings
content/opentoc/DEBS2018-TOC.html	Table of contents for 12th DEBS conference proceedings
content/opentoc/DEBS2017-TOC.html	Table of contents for 11th DEBS conference proceedings
content/opentoc/DEBS2015-TOC.html	Table of contents for 9th DEBS conference proceedings
content/opentoc/DEBS2014-TOC.html	Table of contents for 8th DEBS conference proceedings

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