[BEEEP] SM-1005 - Add env output option (#320)

## Type of change

- [ ] Bug fix
- [x] New feature development
- [ ] Tech debt (refactoring, code cleanup, dependency upgrades, etc)
- [ ] Build/deploy pipeline (DevOps)
- [ ] Other

## Objective

Add an env output option to `bws`. This allows for easier command-line
usage in scripts, particularly where a JSON or YAML parser is not
desirable or available.

Basic usage examples in Bash:

- `source <(bws secret get ec9e0489-244e-4b3f-8782-b0a800fe562f -o env)`
- `bws secret list -o env > .env`

## Code changes

- **`crates/bws/src/render.rs`:** Output secrets in `key="value"` format

## Screenshots


![image](https://github.com/bitwarden/sdk/assets/5676771/72201357-dc4c-471e-b1f0-011297dbb978)

## Before you submit

- Please add **unit tests** where it makes sense to do so (encouraged
but not required)

---------

Co-authored-by: Daniel García <[email protected]>

crates/bws/Cargo.toml

@@ -37,6 +37,7 @@ thiserror = "1.0.40"
 tokio = { version = "1.28.2", features = ["rt-multi-thread", "macros"] }
 toml = "0.8.0"
 uuid = { version = "^1.3.3", features = ["serde"] }
+regex = { version = "1.10.2", features=["std", "perf"], default-features=false }
 
 bitwarden = { path = "../bitwarden", version = "0.3.1", features = ["secrets"] }
 

crates/bws/src/render.rs

@@ -9,6 +9,7 @@ use serde::Serialize;
 pub(crate) enum Output {
     JSON,
     YAML,
+    Env,
     Table,
     TSV,
     None,
@@ -49,6 +50,31 @@ pub(crate) fn serialize_response<T: Serialize + TableSerialize<N>, const N: usiz
             let text = serde_yaml::to_string(&data).unwrap();
             pretty_print("yaml", &text, color);
         }
+        Output::Env => {
+            let valid_key_regex = regex::Regex::new("^[a-zA-Z_][a-zA-Z0-9_]*$").unwrap();
+
+            let mut commented_out = false;
+            let mut text: Vec<String> = data
+                .get_values()
+                .into_iter()
+                .map(|row| {
+                    if valid_key_regex.is_match(&row[1]) {
+                        format!("{}=\"{}\"", row[1], row[2])
+                    } else {
+                        commented_out = true;
+                        format!("# {}=\"{}\"", row[1], row[2].replace('\n', "\n# "))
+                    }
+                })
+                .collect();
+
+            if commented_out {
+                text.push(String::from(
+                    "\n# one or more secrets have been commented-out due to a problematic key name",
+                ));
+            }
+
+            pretty_print("sh", &format!("{}\n", text.join("\n")), color);
+        }
         Output::Table => {
             let mut table = Table::new();
             table