feat: add work in progress lesson 2

lessons/2/index.md

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+---
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+    display_name: Bash
+    language: bash
+    name: bash
+---
+
+# Lesson 2: Piping commands
+
+:::{admonition} Lesson is a work in progress
+:class: warning
+
+This lesson is not complete. Stay tuned!
+
+:::
+
+We've been using one command at a time, but what if we want to use multiple?
+
+For example let's say I want to only see what fruits there are and their availability from `fruits_extended.csv` in a nicely formatted table.
+
+## Selecting the columns
+
+Take a brief look at `qsv select`:
+
+```{code-cell}
+:tags: ["scroll-output"]
+qsv select -h
+```
+
+There are several ways to select the columns we want. Let's take a look at the headers first:
+
+```{code-cell}
+:tags: ["scroll-output"]
+qsv headers fruits_extended.csv
+```
+
+We only want data within the `fruit` and `availability` columns. Let's try selecting the data within those columns:
+
+```{code-cell}
+:tags: ["scroll-output"]
+qsv select 1,4 fruits_extended.csv
+```
+
+Great, we got the column data that we're looking for. But how do we run this data through `qsv table`?
+
+## Command redirection
+
+If you're not sure what `stdin`, `stdout`, and `stderr` are then we recommend reading the "Command data streams (`stdin`, `stdout`, and `stderr`)" section in the Appendix.
+
+<!-- Add link to appendix or do a dropdown or continue lesson and explain each one. -->
+<!-- Improve flow for previous sentence to next one or modify flow. -->
+
+For example let's say we want to display the previous output with `qsv table`. We can run the following to pipe the output into `qsv table`:
+
+```{code-cell}
+:tags: ["scroll-output"]
+qsv select 1,4 fruits_extended.csv | qsv table
+```
+
+Now we've got what we were looking for!
+
+:::{admonition} Exercise is a work in progress
+:class: important
+
+The exercise for this lesson is not available yet. Stay tuned!
+
+:::