Include HSF analysis essentials (backported from Run 3 starterkit) (#322)

Author: GoodingJamie

README.md

@@ -25,7 +25,7 @@ If you'd just like to learn about how to use the LHCb software, [read on](first-
     :includehidden:
     :caption: External links:
 
-    Analysis essentials <https://hsf-training.github.io/analysis-essentials/>
+    interesting-links/analysis-essentials.md
     LHCb Core documentation <https://cern.ch/lhcb-core-doc/>
     LHCb glossary <https://lhcb.github.io/glossary/>
 ```

interesting-links/analysis-essentials.md

@@ -0,0 +1,34 @@
+# HSF analysis essentials
+
+
+Still not found what you're looking for?
+Take a look at the [HSF training centre](https://hsf-training.org/training-center/) for many more training courses, including ROOT, C++, Julia, REANA, CI/CD, Docker and more!
+
+## [An introduction to Python](https://hsf-training.github.io/analysis-essentials/python/README.html)
+This guide covers all of the basics of Python, starting with the core objects and syntax, and working through to modules and classes.
+This guide also introduces scripting with Python and interactive devlopment in Jupyter, useful for all analyses!
+
+## [Advanced Python tutorial](https://hsf-training.github.io/analysis-essentials/advanced-python/README.html)
+Comfortable with Python and looking for more?
+This guide introduces the use of Python for Scientific Computing, with a focus on using Python for HEP analysis.
+The guide introduces libraries for loading and inspecting data, applying selections and producing plots.
+This is extended with an introduction to multivariate analysis and classification, histogram manipulation and reweighting.
+Finally, the guide covers likelihood inference and fitting, and the use of the _sPlot_ method.
+
+## [Introducing the shell](https://hsf-training.github.io/analysis-essentials/shell/README.html)
+This guide gives an overview of how and why to use the shell.
+The guide also covers the navigation of directories, finding of objects and use of pipes, filters and loops.
+
+## [UNIX shell](https://hsf-training.github.io/analysis-essentials/shell-extras/README.html)
+This guide, for the intermediate shell user, introduces screen and tmux for keeping your code running, and has a dedicated section about using these on lxplus.
+It also introduces a variety of concepts such as environment variable, diffs and editors.
+
+## [Analysis automation with Snakemake](https://hsf-training.github.io/analysis-essentials/snakemake/README.html)
+This guide introduces the use of Snakemake, a workflow management system for Python, ideal for tying your analysis together!
+The guide demonstrates how to put a basic workflow together for processing information, setting out rules, wildcards and accompanying files (e.g., logs and configs).
+
+## [Version control with Git](https://hsf-training.github.io/analysis-essentials/git/README.html)
+This guide presents Git for version control in your projects.
+Basic functionality such as creating a Git repository, committing changes, exploring the project history and opening pull/merge requests are introduced.
+More advanced concepts such as CI/CD pipelines, licensing and citation are also covered.
+